More than a dozen artificial turf fields in the District failed safety tests last spring. In terms of hardness, they tested at the equivalent of concrete. They also required repair or replacement. Now, regional parents and advocates are concerned about other issues, including how hot artificial turf surfaces get and the toxicity of the materials used in the turf bed. We speak to the Director of the Department of General Services about these concerns, and how DGS is overseeing and monitoring athletic fields.